Is Sufism a cult of Islam?

Sufism is a part of Islam, but the use of the word "cult" usually
has a negative implication, which is inappropriate. Sufism is
branch of Islam that is more concerned with an emotional connection
to God than an emphasis on legal doctrines. Shari'a and Sufism are
not in conflict; which makes Sufism a completely legitimate
expression of Islam and is just as much a part of Islam as is
traditional Islamic Jurisprudence. It simply uses this
jurisprudence in a looser and more emotional way. Similar parallels
can be drawn between Kabbalah (the real thing - not Madonna stuff)
and Judaism.